Malicious PDF — malware analysis report

Static analysis result for SHA-256 402885d42d824e5d…

MALICIOUS

PDF

34.3 KB Created: 2021-06-25 08:49:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2567b284b5e15d9cfbb731430797bb75 SHA-1: 305002466090269018f41cb5f9fa65c9f0ea357f SHA-256: 402885d42d824e5d0f11e11109cdce52d707c51ad3a8dbf017c44320381c0066
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and free passes. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it uses a common lure for potentially unwanted applications or further malware. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/roblox-free-game-pass-hack-game-hack In PDF document text
    • http://library.stembi.ac.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-noclip-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/synapse-roblox-hack-dll_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-fly-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-do-you-be-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-btools-script-hack-sitev3rmillionnet_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/hack-roblox-exploit-wearedevs_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-groups-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-hack-items-into-roblox-shirts_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-roblox-noclip-exploit_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-robux-no-password-or-username-may_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/cheat-codes-for-roblox-android_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/auto-jump-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF8 22056 bytes
SHA-256: 7c2e6a678797b13376e71672301d69b1d3c3dfe2d5cacee576a3e421908dd0f2
font_01_sfnt_off00006089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6089 19232 bytes
SHA-256: 53ece4139d53ca1c986782ad9249cf994b9b1d0c252b9cd3eff5515c7e47d3a8

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